Notes: The English adverb everywhere doesn't have a corresponding adjective or noun despite the occasional need for one. You can't say things like "The everywhere traffic light" or "I was struck by everywhereness of the double-decker bus in London." Today's word and its noun fill this lacuna. The adverb is ubiquitously and ubiquity is the noun.

In Play: The past decade has seen a rash of technological inventions rise quickly to ubiquity: "The cell phone is becoming more and more ubiquitous throughout the world." Were it not for the ubiquity of the internet, our efforts to put out the good word each day would come to naught.

Word History: Today's word is built on Latin ubi-que "everywhere", itself from ubi "where" + -que "and", + the adjective suffix, -ous. Latin ubi "where" was originally the locative case of Proto-Indo-European *kwo- "where, when, who," *kwo-bhi, which became cubi in compounds like alicubi "somewhere". Hanging out with adverbs like ibi "there", ultimately led to cubi losing its initial [c] and becoming ubique. The same root, *kwo- became who in English and kto "who" in Russian. The pronouns on qu- in Latin share the same source.